Thermal-energy Scattering of Atoms in High Rydberg States. Annual Progress Report, July 1, 1978--June 30, 1979. [Summaries of Research Activities at Oregon State Univ]. PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
This research consists of an experimental study of the scattering of free atoms in high Rydberg states and their interaction with ground-state atomic and molecular targets. The highly excited Rydberg states, lying just below the ionization limit, describe a single weakly bound electron moving around a positive ion core. These states are characterized by large principal quantum numbers, long radiative lifetimes, and large cross sections for certain scattering processes. In the proposed investigations, differential cross sections will be measured for the deflection of high Rydberg atoms from an atomic beam. Preliminary scattering experiments, completed in the laboratory, have yielded cross sections which are virtually independent of the principal quantum number and in good agreement with calculations for deflection of the core ion alone. The deflection was also observed directly. If the momentum transfer takes place as an essentially free-ion process, then it is possible to obtain ion-scattering cross section from measurements with Rydberg atoms as projectiles. The presence of a distant valence electron provides a charge-neutralizing sheath surrounding the ion core, rendering its trajectory virtually unaffected by non-ionizing external fields. Since ion-beam scattering experiments have heretofore proven difficult at thermal energies, this research program seeks to develop and exploit a useful new method for the determination of velocity-resolved free-ion differential cross sections and the functional form of ion-atom and ion-molecule interaction potentials.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
This research consists of an experimental study of the scattering of free atoms in high Rydberg states and their interaction with ground-state atomic and molecular targets. The highly excited Rydberg states, lying just below the ionization limit, describe a single weakly bound electron moving around a positive ion core. These states are characterized by large principal quantum numbers, long radiative lifetimes, and large cross sections for certain scattering processes. In the proposed investigations, differential cross sections will be measured for the deflection of high Rydberg atoms from an atomic beam. Preliminary scattering experiments, completed in the laboratory, have yielded cross sections which are virtually independent of the principal quantum number and in good agreement with calculations for deflection of the core ion alone. The deflection was also observed directly. If the momentum transfer takes place as an essentially free-ion process, then it is possible to obtain ion-scattering cross section from measurements with Rydberg atoms as projectiles. The presence of a distant valence electron provides a charge-neutralizing sheath surrounding the ion core, rendering its trajectory virtually unaffected by non-ionizing external fields. Since ion-beam scattering experiments have heretofore proven difficult at thermal energies, this research program seeks to develop and exploit a useful new method for the determination of velocity-resolved free-ion differential cross sections and the functional form of ion-atom and ion-molecule interaction potentials.
Author: Publisher: ISBN: Category : Power resources Languages : en Pages : 1174
Book Description
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The basic goals of this program concern the experimental determination of properties of atoms and simple molecules that are important in a wide range of energy-related processes. In particular we have initiated measurements of polarizabilities of highly polar molecules and dimers, and of a number of atoms distributed through the periodic table, and, of the scattering of low energy electrons by highly polar molecules. For this latter series of measurements an entirely new apparatus has been designed and its external components have been completed. A new electron optics assembly has also been designed and is currently under construction. Details of all these projects are presented; analysis and data of the polarizability measurements are also given.
Author: Hartmut Figger Publisher: Springer Science & Business Media ISBN: 3662048973 Category : Science Languages : en Pages : 525
Book Description
Published on the occasion of Theodor Hänsch's 60th Birthday emphasis is placed on precision related to results in a variety of fields, such as atomic clocks, frequency standards, and the measurement of physical constants in atomic physics. Furthermore, illustrations and engineering applications of the fundamentals of quantum mechanics are widely covered. It has contributions by Nobel prize winners Norman F. Ramsey, Steven Chu, and Carl E. Wieman.
Author: Anne M. Coghill Publisher: American Chemical Society ISBN: 9780841239494 Category : Authorship Languages : en Pages : 0
Book Description
In the time since the second edition of The ACS Style Guide was published, the rapid growth of electronic communication has dramatically changed the scientific, technical, and medical (STM) publication world. This dynamic mode of dissemination is enabling scientists, engineers, and medicalpractitioners all over the world to obtain and transmit information quickly and easily. An essential constant in this changing environment is the requirement that information remain accurate, clear, unambiguous, and ethically sound.This extensive revision of The ACS Style Guide thoroughly examines electronic tools now available to assist STM writers in preparing manuscripts and communicating with publishers. Valuable updates include discussions of markup languages, citation of electronic sources, online submission ofmanuscripts, and preparation of figures, tables, and structures. In keeping current with the changing environment, this edition also contains references to many resources on the internet.With this wealth of new information, The ACS Style Guide's Third Edition continues its long tradition of providing invaluable insight on ethics in scientific communication, the editorial process, copyright, conventions in chemistry, grammar, punctuation, spelling, and writing style for any STMauthor, reviewer, or editor. The Third Edition is the definitive source for all information needed to write, review, submit, and edit scholarly and scientific manuscripts.
Author: K. Takeuchi Publisher: Springer Science & Business Media ISBN: 4431678611 Category : Political Science Languages : en Pages : 252
Book Description
Japan’s traditional and fragile satoyama landscape system was developed over centuries of human life on mountainous island terrain in a monsoon climate. The carefully managed coppice woodlands on the hillsides, the villages strung along the base of the hills, and the carefully tended paddy fields of rural Japan made possible the sustainable interaction of nature and humans. Radical changes in the middle of the twentieth century led to the abandonment of satoyama landscapes which now are being rediscovered. There is a new realization that these woodlands still play a vital role in the management of the Japanese landscape and a new determination to manage them for the future. This multifaceted book explores the history, nature, biodiversity, current conservation measures, and future uses of satoyama. The information presented here will be of interest in all parts of the world where patterns of sustainable development are being sought.
Author: Jack R. Meredith Publisher: John Wiley & Sons ISBN: 1119369096 Category : Business & Economics Languages : en Pages : 546
Book Description
Projects continue to grow larger, increasingly strategic, and more complex, with greater collaboration, instant feedback, specialization, and an ever-expanding list of stakeholders. Now more than ever, effective project management is critical for the success of any deliverable, and the demand for qualified Project Managers has leapt into nearly all sectors. Project Management provides a robust grounding in essentials of the field using a managerial approach to both fundamental concepts and real-world practice. Designed for business students, this text follows the project life cycle from beginning to end to demonstrate what successful project management looks like on the ground. Expert discussion details specific techniques and applications, while guiding students through the diverse skill set required to select, initiate, execute, and evaluate today's projects. Insightful coverage of change management provides clear guidance on handling the organizational, interpersonal, economic, and technical glitches that can derail any project, while in-depth cases and real-world examples illustrate essential concepts in action.
Author: Brain F. Chabot Publisher: Springer Science & Business Media ISBN: 9400948301 Category : Science Languages : en Pages : 704
Book Description
Although, as W.D. Billings notes in his chapter in this book. the development of physiological ecology can be traced back to the very beginnings of the study of ecology it is clear that the modern development of this field in North America is due in the large part to the efforts of Billings alone. The foundation that Billings laid in the late 1950s came from his own studies on deserts and subsequently arctic and alpine plants, and also from his enormous success in instilling enthusiasm for the field in the numerous students attracted to the plant ecology program at Duke University. Billings' own studies provided the model for subsequent work in this field. Physiological techniques. normally confined to the laboratory. were brought into the field to examine processes under natural environmental conditions. These field studies were accompanied by experiments under controlled conditions where the relative impact of various factors could be assessed and further where genetic as opposed to environmental influences could be separated. This blending of field and laboratory approaches promoted the design of experiments which were of direct relevance to understanding the distribution and abundance of plants in nature. Physiological mechanisms were studied and assessed in the context of the functioning of plants under natural conditions rather than as an end in itself.
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Author: Hartmut Figger
Author: Anne M. Coghill
Author: K. Takeuchi
Author: Jack R. Meredith
Author: Brain F. Chabot